I've been following this thread for a while and decided to post pictures of my falcon. Many of these mods are inspired from posts on this forum. Sorry for the blurry pictures, I couldn't get the focus to work properly.
Here you can see some work I did to detail the gunners seat a little bit. I decided to add another room, which is on the right. I didn't like the blue tubes that came stock, so one of the main mods on my falcon is the new engine section ( inspired by @bricksmarlin . However, I changed the design a bit which incorporates trans clear headlight bricks to connect the engine section to the frame. This allows for a full row of trans pieces. The engine section is attached to the falcon using 1x1 bricks with holes and technic pins.
With the engine mod, I needed to flatten out the bottom panels in the back. I did this by removing some plates and hoisting the whole panel up using some technic pieces (you can see this in the bottom right of the falcon. I also modded the back of the frame to include a "tray" for an led strip, which works very well. It is not pictured anywhere in this post but I also redid the bottom panels.
Here is a full view without top panels:
Here are some close ups of the rooms. The kiss room has only been modified slightly. The one I designed id supposed to represent the room where Han fixes the hyperdrive, this is represented by a small compartment in the floor (which can fit a minifig. The room also has blaster storage, 2 beds, and 2 hallways.The battery pack for the leds sits in my extra room. There is a lot of greebling/controls on the walls. I got a new sticker sheet from LEGO for free (just email customer service and give them your manual number). To accommodate the extra room, I needed to mirror the panels from the left onto the right. This was a somewhat bothersome process and required a few extra pieces.
I made new engine flaps, designed by @MatrixOne . These match the studio model better in my opinion. You can also see the engine with leds turned on. I decided to keep the grey rigging because I think It looks nice. You can also see some custom underside details in the back, this mod uses a lot of 2x2 inverted tiles and some greebling pieces.
The in-between the mandibles piece is also taken from @bricksmarlin. I believe there is an lxf made by @Lock somewhere on this topic. This is one of the most effictive and simple mods for the falcon. Sorry for the blurred picture.
There have been a lot of minor exterior mods, that match the studio model and coloring. Most dark-tan has been replaced with light blueish grey. Most of these changes are inspired form @bricksmarlin, but also highly influenced by my available pieces. Here you can also see my cockpit mod, which can seat all 4 figures with the top closed. This was pretty simple and could probably be replicated just by the picture. You just need to remove the two 1x2 plates with rails. I also added some grey plates and tiles to the loading ramp.
Here is my favorite shot, you can see @Lock's vent fan rotaion mod. This does raise the top side fans by 1 plate, but I think it is abetter solution then LEGO's.
Everything is a work in progress. Looking at these pictures, I can find a few things I need to go back and fix.
Also the remote for the led's isn't working, any ideas why? It worked fine for a few days, but won't do anything now.
I will soon be getting @efferman's stand to display my falcon. For those of you who have already used this stand: do you have any advice for safely applying the falcon and getting the panels secured after?